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Credit: Getty Images

RIO DE JANEIRO, BRAZIL - JULY 28: Nuns sit on Copacabana Beach as the sun rises while awaiting Pope Francis' final Mass on his trip to Brazil on July 28, 2013 in Rio de Janeiro, Brazil. A reported crowd of three million faithful jammed the beach for a prayer vigil on the final night of World Youth Day last night. Francis' first international trip as Pope has drawn millions to see the first Pope to hail from Latin America. Brazil has the largest number of Catholics on Earth. (Photo by Mario Tama/Getty Images)